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Telefunken

1x Telefunken EF804S Orig. Box - ◇ Bottom - Ulm, 1959 - Strong

1x Telefunken EF804S Orig. Box - ◇ Bottom - Ulm, 1959 - Strong

Regular price $129.00 USD
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Product Summary

Model: 1959 Telefunken EF804S (Made in Germany)

Soundlumia Tube Sound Rating9.5/10 - Outstanding 

Late 1950s Ulm, Germany production - Unparalleled sound characteristics and superb build quality - True holographic sound stage with layered details and ultra clarity

Date codes: U4109504 (U = Ulm, 9 = 1959)

GM (Mutual Conductance) test result: 86% of NOS/NEW

Silkscreen: 90% - 100%

PackagingOriginal Telefunken tube box.

Professional Tube Testing

This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result: 

Tube 1:

Measured transconductance(GM): 1.73 mA/V - 86% (100% = 2.00 mA/V)
Measured plate current(IA): 2.515 mA  - 84% (100% = 3 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.

 

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